<!DOCTYPE html>
<meta charset="utf-8">
<title>SharedArrayBuffer cannot cross agent clusters, service worker edition</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/#structuredserialize">
<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>

<script>
"use strict";
promise_test(t => {
  const scope = "resources/blank.html";
  return service_worker_unregister_and_register(t, "resources/serviceworker-failure.js", scope)
  .then(reg => {
    t.add_cleanup(() => service_worker_unregister(t, scope));
    return wait_for_state(t, reg.installing, "activated");
  })
  .then(() =>  with_iframe(scope))
  .then(iframe => {
    t.add_cleanup(() => iframe.remove());
    const sw = iframe.contentWindow.navigator.serviceWorker;
    let state = "start in window";

    return new Promise(resolve => {
      sw.onmessage = t.step_func(e => {
        if (e.data === "start in worker") {
          assert_equals(state, "start in window");
          sw.controller.postMessage(new SharedArrayBuffer());
          state = "we are expecting confirmation of an onmessageerror in the worker";
        } else if (e.data === "onmessageerror was received in worker") {
          assert_equals(state, "we are expecting confirmation of an onmessageerror in the worker");
          state = "we are expecting a messageerror due to the worker sending us a SAB";
          sw.controller.postMessage(state);
        } else {
          assert_unreached("Got an unexpected message from the service worker: " + e.data);
        }
      });

      sw.onmessageerror = t.step_func(e => {
        assert_equals(state, "we are expecting a messageerror due to the worker sending us a SAB");

        assert_equals(e.data, null, "data");
        assert_equals(e.origin, self.origin, "origin");
        assert_not_equals(e.source, null, "source");
        assert_equals(e.ports.length, 0, "ports length");

        state = "done in window";
        resolve();
      });

      sw.controller.postMessage(state);
    });
  });
});
</script>
